Are you publishing all these apps under one dev account? Because Apple have known to ban this practice in the past as they want the account owner to be the person responsible for the content.
Good question. We have looked into that and as long as you provide unique content in the different apps and there is a reason they can't be one app, then it should be ok.
Look at what ChowNow is doing for example: https://itunes.apple.com/us/artist/chownow/id553996348